Go to todayilearned by TIL that most blackboards are actually green because boards that were black tended to reflect a lot of light, while green boards reduced glare and were favored by teachers who had to stare at them all day. #ifttt #reddit #til

Reddit - Dive into anything Go to todayilearned by TIL that most blackboards are actually green because boards that were black tended to reflect a lot of light, while green boards reduced glare and were favored by teachers who had to stare at them all day. Tags: ifttt, reddit, til via Pocket https://ift.tt/icmjUk1 April 25, 2023 at 03:25AM